JP3778082B2 - vending machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vending machine, and more particularly, to a vending machine that can realize energy saving, and can simultaneously achieve chlorofluorocarbon reduction and noise reduction.
[0002]
[Prior art]
The configuration of a conventional two-room vending machine is shown in FIGS. 22 and 23, and the refrigeration cycle configuration is shown in FIG. Here, FIG. 22 is a side sectional view showing a conventional vending machine, FIG. 23 is a front view showing the conventional vending machine, and FIG. 24 is a circuit diagram showing a refrigeration cycle of the conventional vending machine. .
[0003]
As shown in FIGS. 22 and 23, the main body case 1 is provided with an outer door 2 and an inner door 3, and a product storage rack 4 is provided in the left chamber 1L and the right chamber 1R. In the following description, the suffixes L and R are appropriately added to the names of the members related to the left ventricle and the right ventricle.
[0004]
Each chamber 1L, 1R is provided with an internal temperature sensor (not shown) for detecting the internal temperature. The machine room 5 is provided with a compressor 6 as a component device of the refrigerator, a fan 7 for blowing air, a condenser (outdoor heat exchanger) 8 and the like, and an evaporator 9, a fan 10 and a heater in the cabinet. 111 is provided. That is, a refrigerator is used for cooling the product, and a heater 111 is used for heating. R407c, which is a fluorocarbon refrigerant, is generally used as the refrigerant for the refrigerator.
[0005]
Further, the machine room 5 has a front opening 2a and a back opening 1a, and an air passage that sucks air from the front opening 2a and exhausts air from the back opening 1a by using a fan 10 for the condenser 8. It has a structure. The heat generated from the refrigerator is exhausted outside the machine by this air passage structure.
[0006]
Next, the heating / cooling operation of the vending machine will be described. This operation method has the following two operation modes. That is,
(1) CC mode: Cold operation for both left chamber 1L and right chamber 1R (2) CH mode: Cold operation for left chamber 1L and hot operation for right chamber 1R
[0007]
The CC mode operation method will be described with reference to FIGS. Here, FIG. 25 is a timing chart showing an operation method in the CC mode. As shown in FIG. 25, in order to set the beverage temperature to about 3 ° C., for example, when the internal temperature exceeds 5 ° C., the electromagnetic valves 112 and 114 of the respective chambers 1L and 1R are opened to perform cooling.
[0008]
On the other hand, when the internal temperature falls below 0 ° C., the electromagnetic valves 112 and 114 of the respective chambers 1L and 1R are closed and cooling is stopped. At this time, the compressor 6 is operated as long as any one of the solenoid valves 112 and 114 is open. The heat generated by the refrigerator is exhausted by the fan 7 to the outside through the condenser (outdoor heat exchanger) 8.
[0009]
Next, a CH mode operation method will be described with reference to FIGS. Here, FIG. 26 is a timing chart showing an operation method in the CH mode. As shown in FIG. 26, in order to set the beverage temperature to, for example, about 3 ° C., the left chamber 1L opens the solenoid valve 112 when the internal temperature exceeds 5 ° C., starts the compressor 6 and cools it. I do. The right chamber 1R is heated by energizing the heater 111 when the internal temperature is below 53 ° C. in order to set the beverage temperature to about 55 ° C., for example.
[0010]
On the other hand, when the internal temperature exceeds 58 ° C., the heater 111 is turned off and heating is stopped. The heat generated by the refrigerator is exhausted by the fan 7 to the outside through the condenser (outdoor heat exchanger) 8.
[0011]
[Problems to be solved by the invention]
However, in the conventional vending machine, the heat generated in the refrigerator is exhausted to the outside through the condenser (outdoor heat exchanger) 8 without being used for heating the product, and therefore it is contrary to energy saving. was there.
[0012]
In addition, in vending machines equipped with a refrigerator using a chlorofluorocarbon refrigerant, means for using the heat generated in the refrigerator for beverage heating is provided (for example, Japanese Patent No. 3186417). Since it cannot be heated to a drinking temperature of about 55 ° C, it must be heated in combination with a high-frequency induction heating device or the like (the product is preheated to 35 ° C using a heat pump, and this is sold at 55 ° C using a high-frequency induction heating device) There is a problem that the cost becomes high. And in order to heat with a high frequency induction heating apparatus, there also existed the subject that the waiting time for the heating was needed at the time of sale.
[0013]
Furthermore, in the conventional vending machine, in order to exhaust the heat generated in the refrigerator in the machine room 5 to the outside of the machine, a structure is adopted in which the air is sucked from the front opening 2a and exhausted from the back opening 1a. In many cases, when such a vending machine is installed indoors, the noise of the fan 7 and the compressor 6 leaks from the front opening 2a.
[0014]
The present invention has been made in view of the above, and an object of the present invention is to provide a vending machine that can realize energy saving, and can simultaneously achieve de-fluorination and noise reduction.
[0015]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, a vending machine according to claim 1 of the present invention is a wall surface heat exchange comprising any one of a ceiling surface, a side surface, and a back surface of a housing, or any combination thereof. And the bottom surface of the housing is formed as a bottom heat exchanger, and an air inlet is formed on the bottom surface of the housing to form an air passage, and the cold generated in the refrigeration cycle is used to cool the product. The heat is used to heat the product, and the excess heat or cold due to the temperature control is dissipated from the surface and bottom heat exchangers of the vending machine formed as an outdoor heat exchanger. And
[0016]
Since all heating and cooling are performed by controlling the refrigeration cycle, a heater for heating that has been conventionally used is not required, so that power consumption can be reduced, operation costs can be reduced, and energy saving can be realized. In addition, when a flammable refrigerant is used, it is advantageous in terms of explosion-proof properties. Furthermore, a separate heating device required in the above-described prior art is not required, and no waiting time for heating is required at the time of sale. In addition, a heat radiating surface can be secured on the bottom surface of the housing, and heat can be easily radiated. Further, it is not necessary to provide an air inlet on the front surface of the vending machine, and it is possible to minimize the operation noise of the fan and the compressor from leaking to the front of the vending machine. Therefore, a vending machine suitable for indoor installation can be provided.
Moreover, since it is the structure which dissipates heat using the housing | casing of a vending machine, the condenser as a conventional outdoor heat exchanger becomes unnecessary, and the conventional fan for the said heat exchanger can be reduced in size significantly. Accordingly, the volume of the machine room can be reduced, and the amount of goods stored in the warehouse can be greatly increased accordingly.
Moreover, since the wall surface heat exchanger which consists of any one of the ceiling surface of a housing | casing, a side surface, and a back surface, or these arbitrary combinations is provided, a wide heat-transfer area can be ensured and it can carry out heat dissipation easily.
[0017]
A vending machine according to claim 2 of the present invention is characterized in that, in claim 1 described above, HC refrigerant, which is a natural refrigerant, is used as the refrigerant. For example, isobutane, propane, a mixed refrigerant of propane and isobutane, or the like can be used.
[0018]
For example, in order to keep a cold product at 3 ° C. and a hot product at 55 ° C. by a heat pump, a large temperature difference is required as the refrigeration cycle, with an evaporation temperature of −10 ° C. and a condensation temperature of about 70 ° C. For example, when isobutane is used as the refrigerant, the refrigerant pressure at the condensation temperature of 70 ° C. is 1.1 Mpa, which can be handled with a refrigerant pressure less than half that of the refrigerant R407c of the conventional vending machine. It can be sufficiently configured in terms of mechanical strength, and a heat pump with a large temperature difference can be realized.
[0027]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of a vending machine according to the present invention will be described below in detail with reference to the drawings. The present invention is not limited to the embodiments.
[0028]
Embodiment 1 FIG.
1 is a side sectional view showing a vending machine according to a first embodiment of the present invention, FIG. 2 is an explanatory view showing a heat balance of the vending machine, and FIG. 3 is a bottom heat exchanger and a wall heat exchanger. FIG. 4 is an explanatory view showing a refrigerant pipe of a wall surface heat exchanger, and FIG. 5 is a plan view showing an air passage structure of a machine room.
[0029]
6 is a circuit diagram showing a refrigeration cycle configuration, FIG. 7 is a circuit diagram showing a control operation in the CC mode, and FIG. 8 is a timing chart showing an operation method in the CH mode.
[0030]
9 is a circuit diagram showing the control operation in the CH mode (basic), FIG. 10 is a circuit diagram showing the control operation in the CH mode (surplus cooling), and FIG. 11 is in the CH mode (heating surplus). It is a circuit diagram which shows the control action in.
[0031]
In the following description, members that are the same as or correspond to those already described are denoted by the same reference numerals, and redundant description is omitted or simplified.
[0032]
First, the whole structure of a vending machine is demonstrated based on FIGS. The main body case 1 is provided with an outer door 2 and an inner door 3, and a product storage rack 4 is provided in the left chamber 1L and the right chamber 1R. Each chamber 1L, 1R is provided with an internal temperature sensor (not shown) for detecting the internal temperature.
[0033]
By the operation control described later, the left chamber 1L can be used as a cooling chamber and the right chamber 1R can be used as a heating chamber or a cooling chamber. In addition, since all heating and cooling in the storage are performed in the refrigeration cycle, the heater 111 that has been conventionally used for heating is not installed.
[0034]
The machine room 5 is provided with a compressor 6 which is a component of the refrigerator, and a small fan 7 for blowing air. In addition to the product storage rack 4, indoor heat exchangers 20L and 20R and a fan 10 are provided in the cabinet. Is provided.
[0035]
The vending machine according to the present invention has a configuration in which heat is radiated by a wall surface heat exchanger 22 and a bottom surface heat exchanger 24 using the main body case 1 instead of the condenser 8 as a conventional outdoor heat exchanger. As shown in FIG. 3, the wall surface heat exchanger 22 and the bottom surface heat exchanger 24 are connected by a refrigerant pipe 26.
[0036]
As shown in FIGS. 1, 2, and 4, the wall surface heat exchanger 22 is provided on the ceiling surface, the left and right side surfaces, and the back surface of the main body case 1. A pipe 26 is built in.
[0037]
Moreover, the bottom face heat exchanger 24 which consists of a pipe | tube with a fin, etc. is provided in the bottom face of the main body case 1 as shown in FIG.1 and FIG.5, and has the air path structure shown in FIG. That is, the machine room 5 is partitioned by the air passage partition plate 27, and an intake port 28 and an exhaust port 29 are provided on each partitioned bottom surface. In the vicinity of the exhaust port 29, an evaporating dish 30 is installed. In this manner, intake and exhaust in the machine room 5 is performed from the bottom surface of the main body case 1 as indicated by arrows in FIG. 5, and the front door 2 a is not formed in the outer door 2 as in the prior art.
[0038]
As shown in FIG. 6, the refrigeration cycle includes the compressor 6, the indoor heat exchangers 20L and 20R, the wall surface heat exchanger 22, the bottom surface heat exchanger 24, the electromagnetic valves 50, 51, 52, 53, 54, 55, capillary tubes 60, 61, an electronic expansion valve 63, an accumulator 64, check valves 70, 71, 72, 73, 74 and the like as constituent elements and connected as shown in the figure. ing. These components are controlled by a control command issued by a control unit (not shown).
[0039]
As the refrigerant, HC (hydrocarbon) refrigerant, which is a natural refrigerant, is used. For example, isobutane, propane, a mixed refrigerant of propane and isobutane, or the like can be used. This HC refrigerant is used for the following reason. That is, for example, in order to keep a cold product at 3 ° C. and a hot product at 55 ° C. by a heat pump, a large temperature difference is required as an refrigeration cycle with an evaporation temperature of −10 ° C. and a condensation temperature of about 70 ° C.
[0040]
However, the refrigerant used in the refrigeration cycle of the conventional vending machine is a fluorocarbon refrigerant R407c, and the refrigerant pressure at a condensation temperature of 70 ° C. is as high as 3.4 Mpa, which is a reality in terms of the mechanical strength of the components. It cannot be configured. On the other hand, the refrigerant pressure at the isobutane condensation temperature of 70 ° C. is 1.1 Mpa, which is less than half the refrigerant pressure compared to R407c, so that the mechanical strength of the component equipment is sufficient. A heat pump with a large temperature difference can be realized.
[0041]
Next, the heating / cooling operation of the vending machine will be described. Similar to the operation modes described in the prior art, the operation is performed in the following two operation modes.
(1) CC mode: Cold operation for both left chamber 1L and right chamber 1R (2) CH mode: Cold operation for left chamber 1L, Hot operation for right chamber 1R [0042]
The operation method in the CC mode will be described with reference to FIG. The operation method is the same as in the prior art example. That is, in order to set the beverage temperature to about 3 ° C., for example, when the internal temperature exceeds 5 ° C., the solenoid valves 55, 50, 52 are opened to allow the refrigerant to flow as indicated by the thick lines and arrows in the figure. Then, the compressor 6 is operated and cooled.
[0043]
On the other hand, when the internal temperature falls below 0 ° C., the solenoid valves 55, 50, 52 are closed and cooling is stopped. The heat generated in the refrigerator is exhausted to the outside through the wall surface heat exchanger 22 and the bottom surface heat exchanger 24.
[0044]
Next, the operation method in the CH mode will be described with reference to FIGS. As shown in FIG. 8, in the left chamber 1L, when the internal temperature exceeds 5 ° C. in order to set the beverage temperature to about 3 ° C., for example, the control unit issues a cooling request. In the right chamber 1R, when the internal temperature falls below 53 ° C. in order to set the beverage temperature to about 55 ° C., for example, the control unit issues a heating request.
[0045]
When both a cooling request and a heating request are issued, heating and cooling are performed by flowing a refrigerant through the basic circuit of the heat pump shown in FIG. When only the heating request is issued, the refrigerant is supplied to the heat pump circuit (cooling surplus) shown in FIG. 10 to perform the heating operation. At this time, excess cold heat is exhausted by the wall surface heat exchanger 22 and the bottom surface heat exchanger 24.
[0046]
When only the cooling request is issued, the cooling operation is performed by flowing the refrigerant through the heat pump circuit (heating surplus) shown in FIG. At this time, surplus heat is exhausted by the wall heat exchanger 22 and the bottom heat exchanger 24.
[0047]
As described above, according to the vending machine according to the first embodiment, the following effects can be obtained. That is, since this vending machine performs all heating and cooling in the refrigeration cycle, the heater 111 that has been used in the past is not necessary, reducing power consumption and operating costs, and in using flammable HC refrigerant. It is also advantageous in terms of explosion resistance. Furthermore, a separate high-frequency induction heating device required in the above prior art is not required, and no waiting time for the heating is required at the time of sale.
[0048]
Moreover, since it is the structure thermally radiated with the wall surface heat exchanger 22 and the bottom face heat exchanger 24 using the main body case 1 instead of the condenser 8 as a conventional outdoor heat exchanger, In addition to the need for the condenser 8, the conventional fan 7 for the heat exchanger can be greatly reduced in size. Therefore, the volume of the machine room 5 can be reduced, and the amount of goods stored in the warehouse can be greatly increased accordingly.
[0049]
In addition, since the intake and exhaust in the machine room 5 are performed from the bottom surface of the main body case 1 and the conventional front opening 2a is not formed in the outer door 2, the operation noise of the fan 7 and the compressor 6 is moved forward of the vending machine. Leakage can be minimized. Therefore, a vending machine suitable for indoor installation can be provided.
[0050]
In the first embodiment, the bottom intake / exhaust structure has been described. However, the present invention is not limited to this, and for example, a back intake / exhaust structure may be adopted as shown in FIG. Here, FIG. 12 is a plan view showing the rear intake / exhaust structure.
[0051]
That is, a rear heat exchanger 32 is disposed at the lower rear portion of the main body case 1, and an intake port 37 and an exhaust port 38 are formed between the main body case 1 and the rear plate 33 using the spacer 34. is there. Similar to the bottom heat exchanger 24, the back heat exchanger 32 can be configured by a finned tube. Also with these configurations, the same effects as those shown in the above embodiment can be expected.
[0052]
Moreover, although it demonstrated taking the case of the vending machine of 2 chamber machines, it is not limited to this, As shown in FIGS. 13-15, it has three chambers, 1 L of left chambers, 1 M of middle chambers, and 1 R of right chambers, To provide a vending machine configured to control the hot / cold operation of the middle chamber 1M by controlling the opening and closing of the shutters 41 to 44 disposed before and after the partition plate 40 and switching the flow path. You can also. A back duct 36 is provided on the back surface of the main body case 1. Here, FIG. 13 to FIG. 15 are cross-sectional views showing a configuration example of the vending machine corresponding to three rooms, and show a CCH mode, a CCC mode, and a CHH mode, respectively.
[0053]
Embodiment 2. FIG.
In Embodiment 1 described above, HC (hydrocarbon) refrigerant, which is a natural refrigerant, is used, and heat or cold that has been surplus by temperature control is dissipated from the surface of the vending machine casing formed as an outdoor heat exchanger. Although the example to make was demonstrated, the vending machine which uses the HC refrigerant | coolant and radiates the heat or cold which became surplus by temperature control with the conventional outdoor heat exchanger may be sufficient, and this Embodiment 2 requires This shows a vending machine.
[0054]
16 is a side sectional view showing a vending machine according to the second embodiment of the present invention, FIG. 17 is a circuit diagram showing a refrigeration cycle configuration, and FIG. 18 is a circuit diagram showing a control operation in the CC mode. 19 is a circuit diagram showing the control operation in the CH mode (basic), FIG. 20 is a circuit diagram showing the control operation in the CH mode (surplus cooling), and FIG. 21 is a control operation in the CH mode (heating surplus). FIG. Note that the timing chart showing the operation method in the CH mode is the same as that shown in FIG.
[0055]
As shown in FIG. 17, the refrigeration cycle includes the compressor 6, the indoor heat exchangers 20L and 20R, the outdoor heat exchanger 8, the electromagnetic valves 50, 51, 52, 53, 54, and 55, and the capillary tube. 60, 61, an electronic expansion valve 63, an accumulator 64, check valves 70, 71, 72, 73, 74 and the like are provided as components and connected as shown in the figure. These components are controlled by a control command issued by a control unit (not shown).
[0056]
Next, the heating / cooling operation of the vending machine will be described. Similar to the operation modes described in the prior art, the operation is performed in the following two operation modes.
(1) CC mode: Cold operation for both left chamber 1L and right chamber 1R (2) CH mode: Cold operation for left chamber 1L and hot operation for right chamber 1R
The operation method in the CC mode will be described with reference to FIG. The operation method is the same as in the prior art example. That is, in order to set the beverage temperature to about 3 ° C., for example, when the internal temperature exceeds 5 ° C., the solenoid valves 55, 50, 52 are opened to allow the refrigerant to flow as indicated by the thick lines and arrows in the figure. Then, the compressor 6 is operated and cooled.
[0058]
On the other hand, when the internal temperature falls below 0 ° C., the solenoid valves 55, 50, 52 are closed to stop the cooling. The heat generated in the refrigerator is exhausted to the outside through the outdoor heat exchanger 8.
[0059]
Next, the operation method in the CH mode will be described with reference to FIG. 8 described above and FIGS. As shown in FIG. 8, in the left chamber 1L, when the internal temperature exceeds 5 ° C. in order to set the beverage temperature to about 3 ° C., for example, the control unit issues a cooling request. In the right chamber 1R, when the internal temperature falls below 53 ° C. in order to set the beverage temperature to about 55 ° C., for example, the control unit issues a heating request.
[0060]
When both a cooling request and a heating request are issued, heating and cooling are performed by flowing a refrigerant through the basic circuit of the heat pump shown in FIG. When only the heating request is issued, the refrigerant is supplied to the heat pump circuit (cooling surplus) shown in FIG. 20 to perform the heating operation. At this time, excess cold heat is exhausted by the outdoor heat exchanger 8.
[0061]
When only the cooling request is issued, the cooling operation is performed by flowing the refrigerant through the heat pump circuit (heating surplus) shown in FIG. At this time, excess heat is exhausted by the outdoor heat exchanger 8.
[0062]
As described above, according to the vending machine according to the second embodiment, a heat pump with a large temperature difference can be realized, and chlorofluorocarbon can be removed, thereby providing an environment-friendly vending machine.
[0063]
【The invention's effect】
As described above , according to the vending machine according to the present invention, the HC refrigerant that is a natural refrigerant is used as the refrigerant, the cold generated in the refrigeration cycle is used for cooling the product, and the hot heat is used for heating the product. As a result, a heat pump with a large temperature difference can be realized, and chlorofluorocarbon removal can be realized, providing an environment-friendly vending machine.
[0064]
Further , according to the vending machine according to the present invention, the cold heat generated in the refrigeration cycle is used for cooling the product, the hot heat is used for heating the product, and the excess heat or cold heat by the temperature control is used as the outdoor heat exchanger. Since heat is dissipated from the formed casing surface of the vending machine, all heating and cooling can be performed by controlling the refrigeration cycle, and a heating heater that has been conventionally used becomes unnecessary. Therefore, the power consumption can be reduced to reduce the operating cost, and energy saving can be realized. In addition, when a flammable refrigerant is used, it is advantageous in terms of explosion-proof properties.
[0065]
Moreover, since it is the structure which dissipates heat using the housing | casing of a vending machine, the condenser as a conventional outdoor heat exchanger becomes unnecessary, and the conventional fan for the said heat exchanger can be reduced in size significantly. Accordingly, the volume of the machine room can be reduced, and the amount of goods stored in the warehouse can be greatly increased accordingly.
[0066]
Further , according to the vending machine according to the present invention, since the HC refrigerant which is a natural refrigerant is used as the refrigerant, for example, by using isobutane, propane, a mixed refrigerant of propane and isobutane, etc., a heat pump having a large temperature difference. And can sufficiently cope with the mechanical strength of the components with respect to the refrigerant pressure.
[0067]
Moreover, according to the vending machine according to the present invention, since the wall surface heat exchanger made of any one of the ceiling surface, the side surface, the back surface of the housing, or any combination thereof is provided, a wide heat transfer The area can be secured and it is easy to dissipate heat.
[0068]
Further , according to the vending machine according to the present invention, the bottom surface of the housing is formed as a bottom heat exchanger, and an air inlet and an exhaust port are provided on the bottom surface of the housing so as to form an air passage for heat exchange. As a result, a heat radiating surface can be secured on the bottom surface of the housing, and heat can be easily radiated. Further, it is not necessary to provide an air inlet on the front surface of the vending machine, and it is possible to minimize the operation noise of the fan and the compressor from leaking to the front of the vending machine. Therefore, a vending machine suitable for indoor installation can be provided.
[Brief description of the drawings]
FIG. 1 is a side sectional view showing a vending machine according to a first embodiment of the present invention.
FIG. 2 is an explanatory diagram showing a heat balance of a vending machine.
FIG. 3 is an explanatory view showing a connection state between a bottom surface heat exchanger and a wall surface heat exchanger.
FIG. 4 is an explanatory diagram showing refrigerant piping of a wall surface heat exchanger.
FIG. 5 is a plan view showing an air passage structure of a machine room.
FIG. 6 is a circuit diagram showing a refrigeration cycle configuration.
FIG. 7 is a circuit diagram showing a control operation in a CC mode.
FIG. 8 is a timing chart showing an operation method in the CH mode.
FIG. 9 is a circuit diagram showing a control operation in a CH mode (basic).
FIG. 10 is a circuit diagram showing a control operation in a CH mode (cooling surplus).
FIG. 11 is a circuit diagram showing a control operation in a CH mode (heating surplus).
FIG. 12 is a plan view showing a rear intake / exhaust structure.
FIG. 13 is a cross-sectional view showing a configuration example (CCH mode) of a vending machine when dealing with three rooms.
FIG. 14 is a cross-sectional view showing a configuration example (CCC mode) of a vending machine when supporting three rooms.
FIG. 15 is a cross-sectional view showing a configuration example (CHH mode) of a vending machine when supporting three rooms.
FIG. 16 is a side sectional view showing a vending machine according to a second embodiment of the present invention.
FIG. 17 is a circuit diagram showing a refrigeration cycle configuration.
FIG. 18 is a circuit diagram showing a control operation in a CC mode.
FIG. 19 is a circuit diagram showing a control operation in the CH mode (basic).
FIG. 20 is a circuit diagram showing a control operation in a CH mode (cooling surplus).
FIG. 21 is a circuit diagram showing a control operation in a CH mode (heating surplus).
FIG. 22 is a side sectional view showing a conventional vending machine.
FIG. 23 is a front view showing a conventional vending machine.
FIG. 24 is a circuit diagram showing a refrigeration cycle of a conventional vending machine.
FIG. 25 is a timing chart showing an operation method in the CC mode.
FIG. 26 is a timing chart showing an operation method in the CH mode.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Main body case 1L Left chamber 1R Right chamber 1M Middle chamber 2 Outer door 3 Inner door 4 Goods storage rack 5 Machine room 6 Compressor 7, 10 Fan 8 Outdoor heat exchanger 20 Indoor heat exchanger 20L Indoor heat exchanger (left chamber )
20R Indoor heat exchanger (Right room)
22 Wall heat exchanger 24 Bottom heat exchanger 26 Refrigerant piping 27 Air channel partition plate 28 Inlet port 29 Exhaust port 30 Evaporating dish 32 Back surface heat exchanger 33 Back plate 34 Spacer 36 Rear duct 37 Inlet port 38 Exhaust port 40 Partition plate 41 , 42, 43, 44 Shutter 50, 51, 52, 53, 54, 55 Solenoid valve 60, 61 Capillary tube 63 Electronic expansion valve 64 Accumulator 70, 71, 72, 73, 74 Check valve

Claims (2)

A wall surface heat exchanger comprising any one of the ceiling surface, side surface, and back surface of the housing, or any combination thereof, and the bottom surface of the housing is formed as a bottom heat exchanger, and the housing An air inlet and exhaust port are provided on the bottom of the airflow path to form an air passage. The cold heat generated in the refrigeration cycle is used to cool the product, and the heat is used to heat the product. A vending machine characterized in that heat is radiated from the housing surface and bottom heat exchanger of the vending machine formed as a heat exchanger . The vending machine according to claim 1, wherein HC refrigerant, which is a natural refrigerant, is used as the refrigerant .

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